DS-010: X1 Wrong pin name for Pin 1

[mskarayigit]

I think this one should be FMU_CH8. Same error in the "FMUV6X_stm32_pinout RC01" table.

[jinger26]

@davids5 can you please review this?

[DuganY]

@mskarayigit you are correct, this should be FMU_CH8 in DS-010.. Document has been updated.

[jinger26]

Thanks @DuganY . @LorenzMeier: need to make a revision and new release.